Does it matter which way a starter solenoid is wired?It doesn't matter which terminal you place the battery power cable on. If they are connected to a terminal, you are good to go.
What wires go to the solenoid?Starter solenoid wiring in general requires 3 types of wire, the positive-going to the hot battery terminal, the wire going to the starter, and then finally the wire going to the ignition switch. In some cases, you may also need a ground wire as well if it is a 4-post-started solenoid.
What are the 4 terminals on a starter solenoid?Sometimes, there are 4 terminals on the solenoid cap, and those are: terminal B (or 30), terminal M (or C), start terminal S (or 50) and ignition terminal R (or 15a), as shown in Fig below.
What are the S and I terminals on a starter solenoid?The smaller terminals are typically iron bolts: Solenoid terminal S (or 50) is for the control wire connecting to the starter relay and ignition switch. If there is a 4th terminal, this can be terminal R (connects to a ballast resistor) or I (connects to the ignition coil) — this terminal is usually not used.
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